UK-based Moo, a startup that prints ‘mini cards’ from photos and other images that you upload directly or point them to via Flickr, Bebo, or their other partners, has been a real hit among the early adopter, silicon valley crowd. People hand them out like crazy, and they are great, if somewhat expensive, conversation starters.

Next week the company will expand beyond cards and into stickers, which I predict will be even more popular than the cards. Look for them on July 19 on the Moo site.

The stickers, which will be high quality vinyl, will be sold in batches of 90 for $10. And this is cool – every single one of those 90 stickers can be a different image (just like the cards).

Moo, which raised $5 million from Atlas Venture and Index Ventures in April 2006, has sold ‘several million cards’ to customers in 143 countries – including North Korea.

We’ll be giving away some free orders for stickers on the day of launch. Check back then for details.